JP2011200570A - Ceramic-made dental implant abutment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceramic-made dental implant abutment without remarkably impairing an aesthetic property even when a gingival part of the dental implant abutment shows through the gum in dental implant medical treatment which is a medical treatment method for recovering a lost oral cavity function of a lost tooth part.SOLUTION: A part hidden from the gum of the ceramic-made dental implant abutment applied to the oral cavity inner side of a dental implant fixture embedded in a jawbone to serve as an artificial tooth root and penetrating through the gum to form a base of an upper structure is colored in gold system or yellow system ranged by L* of 65 to 90, a* of -25 to 25 and b* of 35 to 70 indicated by L*a*b* color system.

Description

  The present invention relates to a dental implant treatment, which is a treatment method for recovering a lost oral function of a missing tooth, even if the gum portion of a dental implant abutment is seen through the gums. The present invention relates to a dental implant abutment made of ceramic that does not significantly impair the performance.

  As a treatment method to recover the lost oral function of the missing tooth, a dental prosthesis inside the oral cavity of a dental implant fixture that becomes an artificial tooth root that is embedded in the jawbone of the missing tooth and bone-bonded to the jawbone Dental implant treatment for fixing objects is widespread. In this dental implant treatment, conventionally, there is a structure in which a dental implant abutment that penetrates the gingiva is arranged inside the oral cavity of the dental implant fixture, and a dental prosthesis is arranged inside the oral cavity of the dental implant abutment. It was general (for example, refer patent documents 1-3).

  However, in such a dental implant treatment, in the case of a patient with thin gingival thickness, the dental implant abutment placed inside the oral cavity of the dental implant fixture is gingival after the dental implant treatment. You may see through it.

  Conventional dental implant abutments are made of titanium or a titanium alloy in consideration of biocompatibility and the like, so that when the inner part of the oral cavity of the dental implant abutment is seen through the gingiva, the metal color titanium or titanium There was a drawback that it was darkened by the alloy and significantly deteriorated aesthetics.

  In recent years, due to the advancement of dental CAD / CAM technology, a method of scraping a dental implant abutment from a ceramic block has become widespread, but this ceramic is opaque because it is mainly composed of zirconia. Since the white color of the dental implant abutment, the inner part of the oral cavity of the dental implant abutment is aesthetically unnatural when seen through the gingiva.

  In order to solve this problem, the present applicant has proposed a dental implant abutment in which the color of the portion hidden in the gingiva resembles that of the gingiva in a red color (see, for example, Patent Document 4). However, dental implant abutments of reddish color often show an unnatural dark red or black color when viewed through the gingiva, which is still aesthetically unsatisfactory.

Japanese Patent Laid-Open No. 7-80003 JP 2003-325552 A US Pat. No. 5,674,072 JP 2009-082171 A

  Accordingly, an object of the present invention is to provide a ceramic dental implant abutment that does not impair the aesthetics of a conventional dental implant abutment even if a subgingival margin part is seen through the gum. .

As a result of intensive studies to solve the above problems, the present inventors have found that the gum part of a ceramic dental implant abutment has an L ^* of 65 to 90 as indicated by the L ^* a ^* b ^* color system. Even if the gums can be seen through the gums, the parts are dark or unnatural by using a gold or yellow color with a ^* ranging from -25 to 25 and b ^* ranging from 35 to 70. The present invention was completed by investigating that no color was produced.

That is, the present invention relates to a dental implant abutment made of ceramic, which is attached to the oral cavity of a dental implant fixture that is embedded in a jawbone and serves as an artificial tooth root and penetrates the gingiva and serves as a foundation of an upper structure. The gold or yellow color in which the portion hidden in the region is indicated by the L ^* a ^* b ^* color system in which L ^* is 65 to 90, a ^* is −25 to 25, and b ^* is 35 to 70 A dental implant abutment made of ceramic.

  The ceramic dental implant abutment according to the present invention is an excellent ceramic dental implant that does not impair the aesthetics of the conventional dental abutment even if the subgingival portion is seen through the gingiva. For abutments.

In the ceramic dental implant abutment according to the present invention, the portion hidden by the gingiva, that is, the lower gingival margin portion is indicated by L ^* a ^* b ^* color system display L ^* is 65 to 90, and a ^* is -25 to 25, b ^* is a gold-based or yellow-based color shown in the range of 35 to 70.

In other words, L ^* a ^* b ^* color system display shows L ^* that shows the brightness (brightness) of the color, a ^* indicating the hue (the degree of red and green), saturation (the degree of yellow and blue) b ^* were analyzed three elements, and L ^*, a ^*, b ^* that is intended to represent a color tone three numbers, it L ^* is showing the lightness (brightness) of the color tone is from 65 to 90 is required. This is not preferable because if L ^* is less than 65, the portion that is too dark and penetrates the gingiva appears black, and if it exceeds 90, the portion that is too bright and penetrates the gingiva appears to be unnatural. This is not preferable. Especially, it is more preferable that L ^* is 70-85.

Moreover, a ^* which shows a hue (red and the degree of green) needs to be -25-25. This is not preferable because if a ^* is less than −25, green is too strong and the portion penetrating the gingiva appears black, and if it exceeds 25, redness is too strong and the portion penetrating the gingiva is rather unfavorable. It is not preferable because it looks natural. Among them, it is more preferable that a ^* is −20 to 20.

And b ^* which shows saturation (degree of yellow and blue) needs to be 35-70. This is because when b ^* is less than 35, yellowness is small and the intended effect of the present invention is difficult to obtain, and when it exceeds 60, the yellowness is too strong and the portion penetrating the gingiva is rather unnatural. This is not preferable. Especially, it is more preferable that b ^* is 45-65.

  The ceramic coloring method in the ceramic dental implant abutment according to the present invention can be a conventionally known method, and the dental implant abutment surface is mixed with a coloring oxide during ceramic production. There are a coloring method for sintering and a coloring method for applying a metal ion or a metal complex solution during temporary sintering. In particular, the method described in Japanese Patent No. 3962214 is preferable because it can be easily and deeply colored from the surface. Even if the conventional dental implant abutment made of titanium is anodized and colored in gold, the colored layer is thin, so that a titanium color appears when the form is corrected.

  Hereinafter, a dental implant abutment made of ceramic according to the present invention will be described in detail with reference to the drawings.

  In the drawing, 1 is a dental implant fixture which is embedded in the jawbone of the missing tooth and is combined with the jawbone to become an artificial tooth root in the dental implant treatment for recovering the lost oral function of the missing tooth. There is a substantially cylindrical shape as shown in Patent Document 1 or a substantially cylindrical shape as shown in Patent Document 2, and a male screw is screwed on the outer periphery thereof. An internal thread 1a is screwed in the central axial direction. An engaging portion 1b for engaging the dental implant abutment 2 made of ceramic according to the present invention, which will be described later, so as not to rotate is provided inside the oral cavity. As this engaging part 1b, as shown in FIG.1 and FIG.3, when the engaging part 2a provided in the dental implant fixture 1 side of the dental implant abutment 2 is prismatic shapes, such as a hexagon, Is a concave portion whose shape is in the shape of a prism, and an engaging portion 2a provided on the dental implant fixture 1 side of the dental implant abutment 2 as shown in FIG. Is a columnar shape that conforms to the square shape, and is provided on the dental implant fixture 1 side of the dental implant abutment 2 as shown in FIG. When the engaging portion 2a has a shape in which ridges are provided at a predetermined interval on a cylindrical outer periphery, the cross section thereof is a shape in which ridges are provided at a predetermined interval on a circular outer periphery. When such an engaging portion 1b is columnar, a through hole communicating with the female screw 1a is formed in the engaging portion 1b.

Reference numeral 2 denotes a ceramic dental implant abutment according to the present invention, which is attached to the oral cavity of a dental implant fixture 1 which is embedded in a jawbone and becomes an artificial tooth root and penetrates the gingiva and serves as a foundation of an upper structure. The portion 2d hidden in the gingiva, that is, the lower gingival margin portion is indicated by L ^* a ^* b ^* color system display, L ^* is 65 to 90, a ^* is −25 to 25, b ^* is 35 to 60 It is a gold or yellowish color indicated by the range. More specifically, the gingival marginal portion, which is mainly composed of zirconia and is at least the portion 2d hidden in the gingiva, is indicated by L ^* a ^* b ^* color system display L ^* is 65 to 90, and a ^* is −25. Coloring method of mixing dental oxide abutment surface with a coloring oxide at the time of ceramic production and sintering so that a gold color or a yellow color indicated in a range of ˜25, b ^* in a range of 35 to 70, What is necessary is just to color by the coloring method etc. which apply | coat a metal ion or a metal complex solution at the time of temporary sintering. In addition, the portion other than the portion 2d hidden in the gingiva, that is, the prosthesis fixing portion 2c in the case where the later-described prosthesis fixing portion 2c is integrally formed is colored in the gold or yellow color. There is no need.

  The dental implant abutment 2 made of ceramic according to the present invention is a diagram for engaging with an engaging portion 1b provided on the inside of the oral cavity of the dental implant fixture 1 on the side opposite to the inside of the oral cavity. 1 and a prismatic shape such as a hexagon as shown in FIG. 3, a rectangular recess such as a hexagonal cross section as shown in FIG. 5, or a cylindrical outer periphery as shown in FIG. A prosthesis made of a member different from the dental implant abutment 2 as shown in FIGS. 1, 2 and Patent Document 1 is provided on the inside of the oral cavity. The aspect in which the oral cavity inner engagement portion 2b that engages the object forming member so as not to rotate is provided, or the portion that penetrates the gingiva as shown in FIGS. 3, 4, 5, 6, and 2 It has an outer surface of a substantially truncated cone shape inside the oral cavity The embodiment in which the binding portion 2c is formed integrally or the portion 2c having a shape corresponding to the shape of the dental prosthesis formed as shown in FIG. 7 is formed integrally. As shown in FIG. 1, FIG. 2, Patent Document 1, and Patent Document 2, when the engaging portion 2a is engaged with the inside of the oral cavity of the dental implant fixture 1, The dental implant fixture 1 has a shape that expands from the outer surface of the oral cavity to the inner side of the oral cavity, or extends from the outer periphery of the inner surface of the oral cavity of the dental implant fixture 1 to the inner side of the oral cavity as shown in FIG. There is something like this. And the oral cavity inner end part which spreads from the oral cavity inner side surface of the dental implant fixture 1 to the oral cavity inner side is a flat shape, or between the teeth in consideration of the interdental papilla as shown in FIG. There is a scallop structure in which the nipple side protrudes from the inside of the mouth.

A dental implant abutment having the shape shown in FIG. 7 was produced from the pre-sintered zirconia block body by a cutting machine, and each was coated with a Pr (III) Cl ₃ aqueous solution having a metal concentration shown in Table 1 and then sintered. The dental implant abutment made of ceramic was produced by linking (Examples 1 to 3). Further, Comparative Example 1 was a ceramic dental abutment made by sintering without applying the aqueous solution.

  In addition, a dental implant abutment having the shape shown in FIG. 7 is prepared from a pre-sintered zirconia block body using a cutting machine, and a commercially available crown-colored colorant (product name: Inseram 2000YZ Coloring Liquid) is hidden in the gingiva. A ceramic dental implant abutment prepared by applying LL1 (manufactured by Vita) and then sintering was used as Comparative Example 2.

L ^* , a ^*, and b ^* in the L ^* a ^* b ^* color system display of these dental implant abutments made of ceramic are spectrocolorimeters (trade name: Shade Eye NCC, manufactured by Matsukaze) The measured results are shown in Table 1.
Moreover, the dental hard resin which imitated the patient's gum in the part hidden in the gum of the dental implant abutment made of ceramics of Examples 1 to 3 and Comparative Examples 1 and 2 (trade name: Gladia Gum, manufactured by GC Corporation) Was made to adhere to a thickness of 0.5 mm and polymerized to obtain a test piece. This test piece is visually observed from the dental hard resin side in the human oral cavity and shown in Table 1 as an effect based on the following measurement results.
Measurement result ○: The abutment is hardly noticeable △: The abutment is noticeable when attention is paid ×: The abutment is noticeable

1 is a perspective view of one embodiment of a ceramic dental abutment according to the present invention. FIG. It is longitudinal cross-sectional explanatory drawing which shows the state after completion of the dental implant treatment using the dental implant abutment shown in FIG. FIG. 6 is a perspective view of another embodiment of a ceramic dental implant abutment according to the present invention. It is a longitudinal cross-sectional explanatory drawing which shows the state after completion of the dental implant treatment using the dental implant abutment shown in FIG. FIG. 6 is a perspective view of still another embodiment of the ceramic dental implant abutment according to the present invention. FIG. 6 is a perspective view of still another embodiment of the ceramic dental implant abutment according to the present invention. FIG. 6 is a perspective view of still another embodiment of the ceramic dental implant abutment according to the present invention.

1 Dental implant fixture
1a Female thread
1b Engagement part 2 Dental implant abutment
2a Engagement part
2b Oral inner engagement part
2c Prosthesis fixation site
2d Hidden part of the gum

Claims (1)

A dental implant abutment made of ceramic, which is inserted into the jaw bone and is placed inside the oral cavity of a dental implant fixture that becomes an artificial tooth root and penetrates the gingiva and becomes the base of the upper structure. The portion hidden in the gingiva is L ^{* It is} a gold or yellowish color in which L ^* is in the range of 65 to 90, a ^* is in the range of −25 to 25, and b ^* is in the range of 35 to 70 in the a ^* b ^* color system. Ceramic dental implant abutment.

Images